Chapter 19: Q4CP (page 635)
What is the function of light-harvesting complexes?
Short Answer
Light-harvesting complex and their functions
Chapter 19: Q4CP (page 635)
What is the function of light-harvesting complexes?
Light-harvesting complex and their functions
All the tools & learning materials you need for study success - in one app.
Get started for freeIn an effort to increase the efficiency of photosynthesis in crop plants, researchers have genetically engineered tobacco plants (a model organism) to express cyanobacterial carboxylase, which has lower oxygenase activity. However, tobacco plant growth was not enhanced unless the plants were also engineered to express the cyanobacterial genes for bicarbonate transporters. Explain this observation.
How do pH, , and ferredoxin link the light reactions with control of the Calvin cycle?
The shell of the cyanobacterial carboxysome described in Problem 25 is relatively impermeable to . Why would this be an advantage for the bacteria?
Oil is a major energy-storage molecule in most seeds. During seed development in some plants, oil (triacylglycerols) is synthesized usingderived from sucrose. The developing seed also contains RuBP carboxylase, although the Calvin cycle is not active.
(a) How does the carboxylase maximize the efficiency of converting starch into oil?
(b) The seeds that contain RuBP carboxylase are green, suggesting that they harvest some light energy. Explain why some energy collection would be useful in the developing seed.
Calculate the change in free energy for the transit of two electrons from the quinone pool to cytochrome c2 in purple bacterial photosynthetic electron transport. Assume that the reduction potential of cytochromec2is similar to those of other c-type cytochromes.
What do you think about this solution?
We value your feedback to improve our textbook solutions.